Russell Brand got very flirty with a married Katherine McPhee while on Monday night’s episode of Late Night with Jimmy Fallon.

The actor/comedian made the Smash star sit on his lap during her segment, although it was all in good fun.

"Katharine is welcome to sit here," Brand, 37, said as he pulled 28-year-old McPhee to his lap. Before letting her go back to her seat, he told her, "You're beautiful! I'll just be here…with my sexual charisma,” E! Online reports.

McPhee looked pretty taken back by it all, telling Fallon when she was settled back in her seat, "Oh my gosh this is all too much for just the first thirty seconds," NY Daily News reports.

Before he ultimately ended up walking off set, McPhee was telling a story about her favorite team, the San Francisco 49ers.

"We managed to get tickets to the Super Bowl," she told Fallon before making it clear, "And when I say we I mean my husband."

Brand then replied, "Look at the way you dropped the Jets, you could drop that guy any day,” before following up with, "I'm only joking, you should never destroy a marriage unless you're really bored.”